/* .layui-nav-child dd {
    position: relative;
}

.layui-nav-child i {
    position: absolute;
    left: 0px;
    top: 0px;
} */

.tx {
    height: 20px;
    width: 20px;
    background-color: pink;
}

iframe {
    width: 100%;
    height: 100%;
}